whoa just a minute here
I am a wild life rehabber and I have been bite a million times by squirrels young and old, wild and tame.
1) Squirrels ALMOST NEVER rare, rare, rare , carry rabies ----do you research.(think there has only been 3 cases in all the years that the US has been keeping data and those cases were questionable) It just doesn't happen neither do opossums or armadillos (however armadillos can transmit leprosy)
This is right from the CDC website
Small mammals such as squirrels, rats, mice, hamsters, guinea pigs, gerbils, chipmunks, rabbits, and hares are almost never found to be infected with rabies and have not been known to cause rabies among humans in the United States.
This squirrel bite in defense..... period. No other reason and the wound can get infected (yup had that happen) just be sure to clean the wound with a good wound cleaner. Nothing to pass on to your chickens etc.
Squirrels bites --- believe it or not --- are very painful so your pet might show some discomfort from it.
Other then that he/she should be fine